av/cmd/audio-player/main.js

/*
NAME
  main.js

AUTHOR
  Trek Hopton <trek@ausocean.org>

LICENSE
  This file is Copyright (C) 2018 the Australian Ocean Lab (AusOcean)

  It is free software: you can redistribute it and/or modify them
  under the terms of the GNU General Public License as published by the
  Free Software Foundation, either version 3 of the License, or (at your
  option) any later version.

  It is distributed in the hope that it will be useful, but WITHOUT
  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
  for more details.

  You should have received a copy of the GNU General Public License in gpl.txt.
  If not, see [GNU licenses](http://www.gnu.org/licenses).
*/

window.onload = function () {
	document.getElementById('input').addEventListener('change', processData);
}

function processData() {
	const input = event.target.files[0]
	const reader = new FileReader()

	reader.onload = event => {
		bytes = new Uint8Array(event.target.result)

		// decode adpcm to pcm
		var decoded = decode(Array.from(bytes))

		// convert raw pcm to wav
		var wav = pcmToWav(decoded, 48000, 1, 16);

		// play wav data in player
		const blob = new Blob([Uint8Array.from(wav)], {
			type: 'audio/wav'
		});
		const url = URL.createObjectURL(blob);

		const audio = document.getElementById('audio');
		const source = document.getElementById('source');

		source.src = url;
		audio.load();
		audio.play();
	}
	reader.onerror = error => reject(error)
	reader.readAsArrayBuffer(input)

}